<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Document</title>
</head>

<body>
  <script>
    // 浅拷贝，把对象第1层的属性和值，拷贝给另一个对象
    let obj1 = { title: 'aaaaaa', subject: '前端' }

    // -------------------- 直接赋值 ------------------
    // let obj2 = obj1 // (直接赋值，赋值的是地址)
    // obj2.title = 'bbbbb'

    // -------------------- 浅拷贝 -------------------
    let obj2 = { ...obj1 }
    obj2.title = 'bbbbbbb'

    console.log(obj1, obj2)
  </script>
</body>

</html>